1 /* 2 * Copyright 2014 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #include "SkBBHFactory.h" 9 #include "SkRTree.h" 10 #include "SkTileGrid.h" 11 12 13 SkBBoxHierarchy* SkRTreeFactory::operator()(int width, int height) const { 14 // These values were empirically determined to produce reasonable 15 // performance in most cases. 16 static const int kRTreeMinChildren = 6; 17 static const int kRTreeMaxChildren = 11; 18 19 SkScalar aspectRatio = SkScalarDiv(SkIntToScalar(width), 20 SkIntToScalar(height)); 21 bool sortDraws = false; // Do not sort draw calls when bulk loading. 22 23 return SkRTree::Create(kRTreeMinChildren, kRTreeMaxChildren, 24 aspectRatio, sortDraws); 25 } 26 27 SkBBoxHierarchy* SkTileGridFactory::operator()(int width, int height) const { 28 SkASSERT(fInfo.fMargin.width() >= 0); 29 SkASSERT(fInfo.fMargin.height() >= 0); 30 // Note: SkIRects are non-inclusive of the right() column and bottom() row. 31 // For example, an SkIRect at 0,0 with a size of (1,1) will only have 32 // content at pixel (0,0) and will report left=0 and right=1, hence the 33 // "-1"s below. 34 int xTileCount = (width + fInfo.fTileInterval.width() - 1) / fInfo.fTileInterval.width(); 35 int yTileCount = (height + fInfo.fTileInterval.height() - 1) / fInfo.fTileInterval.height(); 36 return SkNEW_ARGS(SkTileGrid, (xTileCount, yTileCount, fInfo)); 37 } 38
